Ketone-hydrazine crosslinking aqueous acrylic resin with film-forming-assisting function and preparation method and application thereof

A technology of water-based acrylic and acrylic resin, applied in the direction of coating, etc., can solve the problems of high VOC content of the coating film, poor water resistance of the coating film, and large amount of addition, so as to reduce VOC content, reduce the amount of addition, and improve chemical resistance Effect

Active Publication Date: 2017-05-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to provide the application of a kind of ketone hydrazine cross-linked water-based acrylic resin in water-based wood coatings, so as to solve the problems of the existing water-based polyacrylate wood coatings with a large amount of organic small molecule film-forming aids and the VOC content of the coating film. Problems such as high and poor water resistance and low hardness of the coating film

Method used

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  • Ketone-hydrazine crosslinking aqueous acrylic resin with film-forming-assisting function and preparation method and application thereof
  • Ketone-hydrazine crosslinking aqueous acrylic resin with film-forming-assisting function and preparation method and application thereof
  • Ketone-hydrazine crosslinking aqueous acrylic resin with film-forming-assisting function and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A kind of ketohydrazine cross-linked water-based acrylic resin with film-forming function, the raw material formulation components are as shown in Table 1:

[0034] Table 1

[0035]

[0036]

[0037] (1) The preparation technology of the ketone hydrazine crosslinking type water-based acrylic resin with film-forming function, comprises the following steps:

[0038] Dissolve the acrylic monomer, diacetone acrylamide and initiator azobisisobutyronitrile in the solvent to obtain a mixture, add 50% of the mass of the mixture into the reaction kettle, raise the temperature to 78°C, keep the temperature for 10min, and then put the remaining mixture Add it dropwise to the reaction kettle within 4 hours, and keep it warm for 2 hours after the drop is completed. Cool down to 60°C, add a neutralizing agent to react for 10 minutes; add deionized water to disperse, and after the dispersion is stable, distill under reduced pressure to remove the solvent, add adipic hydrazide and...

Embodiment 2

[0045] A kind of ketohydrazine cross-linked water-based acrylic resin with film-forming function, the raw material formula components are as shown in Table 2:

[0046] table 3

[0047]

[0048] (1) The preparation technology of the ketone hydrazine crosslinking type water-based acrylic resin with film-forming function, comprising the following steps: acrylic acid monomer, diacetone acrylamide and initiator azobisisobutyronitrile are dissolved in a solvent to obtain a mixture, Add 30% of the mass of the mixture into the reaction kettle, raise the temperature to 80° C. and keep it warm for 30 minutes; add the remaining mixture into the reaction kettle dropwise within 4 hours, and keep it warm for 2.5 hours after the dropping. Cool down to 50°C, add neutralizing agent to neutralize to pH 8‐10 and react for 30 minutes; add deionized water to disperse, and after the dispersion is stable, distill under reduced pressure to remove the solvent, add adipic hydrazide and stir evenly t...

Embodiment 3

[0055] A kind of ketone hydrazine cross-linked water-based acrylic resin with film-forming function, the raw material formula components are as shown in table 5:

[0056] table 5

[0057]

[0058] (1) The preparation technology of the ketone hydrazine cross-linking type waterborne acrylic resin with film-forming function, comprises the following steps: acrylic acid monomer, diacetone acrylamide and initiator azobisisobutyronitrile are dissolved in, to obtain mixture, and 20% of the mass of the mixture was added to the reactor, and the temperature was raised to 80° C. for 20 minutes; the remaining mixture was added dropwise to the reactor within 3 hours, and then kept for 2 hours for reaction. Cool down to 60°C, add neutralizing agent to neutralize to pH 8‐10 and react for 20 minutes; add deionized water to disperse, and after the dispersion is stable, distill under reduced pressure to remove the solvent, add adipic hydrazide and stir evenly to obtain a Ketohydrazine cross-...

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Abstract

The invention discloses ketone-hydrazine crosslinking aqueous acrylic resin with a film-forming-assisting function and a preparation method and application thereof. The preparation method comprises the steps of: dissolving an acrylic monomer, diacetone-acryloamide and an initiator in a solvent, then adding 20-50% of the mixture into a reaction kettle, and raising the temperature to 60-90 DEG C; dropwise adding the residual monomer and initiator into the reaction kettle within 3-5 hours, and performing an insulating reaction for 1.5-3.0 hours after dropwise adding; reducing the temperature to below 80 DEG C, adding a neutralizer to neutralize for 10-30 minutes, and adding water to disperse; and after dispersing and stabilizing, distilling to remove the solvent, and adding adipic dihydrazide to obtain the ketone-hydrazine crosslinking aqueous acrylic resin. The ketone-hydrazine crosslinking aqueous acrylic resin has an excellent film-forming-assisting function and can replace a small molecular coalescing agent to assist high Tg-polyacrylate emulsion to form a film. The content of volatile organic compounds of a prepared aqueous wood coating is lower than 50g / L, and the coating has an excellent chemical-resistant property.

Description

technical field [0001] The invention relates to an acrylic resin, in particular to a preparation method and application of a kethydrazine cross-linked water-based acrylic resin with a film-forming function, and belongs to the field of organic polymer synthesis. Background technique [0002] The VOC of waterborne wood coatings mainly comes from residual monomers, coalescents, antifreezes and other additives in the emulsion. Among them, the film-forming aid is an organic small molecule solvent with a content of 1.5-15%, which will volatilize into the atmosphere during the film-forming process and has become the main source of volatile organic compounds (VOC) in water-based wood coatings. Effectively reducing the amount of coalescents added, preferably without organic small molecule coalescents, is the best way to prepare waterborne wood coatings with ultra-low or even zero VOC content. [0003] Foreign countries use Latex Blend technology to reduce the VOC content of water-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F220/58C08F222/02C08F2/06C09D7/12C09D133/04C09D133/08C09D133/10
CPCC08F2/06C08F220/18C08F220/1804C08F220/1808C08L2205/02C09D7/63C09D7/65C09D133/04C08L33/08C08L33/10C08F220/06C08F220/58C08F220/14C08F222/02
Inventor 瞿金清戴竟涛
Owner SOUTH CHINA UNIV OF TECH
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